As far as technical aspects go, Harbinger does things very well. However, the gameplay really lacks variety. Most of the battles boil down to you firing a few shots and then running away to put more distance between you and the enemy. This process simply repeats until the enemy is eliminated. There's not much skill involved.

And to make matters worse, the intelligence of the enemies is incredibly limited. Sometimes they'll run away when they have low health, but for the most part they'll just continue to follow you until you or they are dead. They don't attempt to do anything intelligent, like hide behind objects or call for reinforcements. It's a very humdrum experience.​